6509956 has 6 divisors (see below), whose sum is σ = 11392430. Its totient is φ = 3254976.

The previous prime is 6509953. The next prime is 6509977. The reversal of 6509956 is 6599056.

It can be written as a sum of positive squares in only one way, i.e., 5760000 + 749956 = 2400^2 + 866^2 .

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6509953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 813741 + ... + 813748.

Almost surely, 2^6509956 is an apocalyptic number.

It is an amenable number.

6509956 is a deficient number, since it is larger than the sum of its proper divisors (4882474).

6509956 is a wasteful number, since it uses less digits than its factorization.

6509956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1627493 (or 1627491 counting only the distinct ones).

The product of its (nonzero) digits is 72900, while the sum is 40.

The square root of 6509956 is about 2551.4615419402. The cubic root of 6509956 is about 186.7207935439.

Adding to 6509956 its product of nonzero digits (72900), we get a palindrome (6582856).

The spelling of 6509956 in words is "six million, five hundred nine thousand, nine hundred fifty-six".